ES2674335T3 - End division method for metal plate or metal bar and method for joining it - Google Patents

Abstract

A method for dividing a part of the end of a workpiece in the longitudinal direction with respect to the workpiece, in which the workpiece is a metal plate (1) having any of a rectangular, polygonal or elliptical, or a metal bar (2) having a cross section of any of a circular, elliptical, rectangular or polygonal shape, wherein the method comprises the steps of firmly securing the workpiece by tightening both sides of the metal plate (1), or at least two areas of opposite faces on the periphery of the metal bar (2), with a clamping device (3); divide the work piece lengthwise by pressing with a cutting punch (4) or a splitting punch (5) against the face of one end of the work piece; advance the division of the workpiece further by applying the pressing operation with the cutting punch (4) or the splitting punch (5) against the dividing groove once more or repeatedly two or more times until the division length reaches a specified extension, characterized in that, between each pressing-dividing operation, the position of at least one side of the clamping device (3), which presses both sides of the workpiece, relative to the workpiece in a longitudinal path corresponding to the distance from the position of the groove of the division to almost the same position at the distal end of the area to be divided.

Description

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DESCRIPTION

End division method for metal plate or metal bar and method for joining it {Technical field}

The present invention relates to a method according to the preamble of claim 1 for the division of a part of the end of a metal plate having any of a rectangular, polygonal, or elliptical shape, or an end part of a bar metal having a cross section of any of a circular, elliptical, rectangular, or polygonal shape, in the longitudinal direction with respect to the metal plate or the metal bar, in which the method allows a free adjustment of the length of the incision in the division zone and provides smooth and uniform division faces. The present invention further relates to a metal part manufactured by the invented method for dividing the end and a method for joining parts thus manufactured.

{Background of the invention}

Until now, in the field of metal sheet V pulleys and sheet metal brake shoes, a manufacturing method is known such that a rotating cutting roller or a rotating excision roller is pressed against the outer peripheral area of a material circular metal to divide said area into two parts (see patent literature 1 to 5). This method has the advantages of excellent dimensional accuracy and reliability together with a reduced manufacturing cost compared to a conventional method such as welding, pressing, or casting, because the method can accurately and easily divide a sheet into one position. desired in the direction of the thickness of the outer periphery thereof.

Additionally, the bibliographies of patents 6 and 7 have revealed a method of training in the manufacture of V-pulleys. In the method disclosed, one of two pins (or areas formed of a guide), to be formed on both sides of the periphery Outside of a cylindrical body that projects in the axial direction to prevent slippage of the V-belt, it is formed by excision using a cylindrical excision punch.

Patent literature 8 has proposed a method of training in the manufacture of drum brakes. In the proposed method, the circumferential peripheral area of the cylindrical metal body with bottom is cut by means of a cutting die to form a dust cover zone integrally with a flange zone and then the cut area is dragged by a press die to form a cylindrical zone that functions as the integrated dust cover.

Additionally, a method of dividing the end for a work piece of relatively soft material, different from a metal plate or a metal bar, has been disclosed in patent literature 9. This method is to cut a soft synthetic resin dividing belt into longitudinal halves by pulling the divider strip with a cutting blade applied over the cross section of the end thereof.

{Patent Bibliography 1}

Japanese patent application open for inspection No. 1986-129241 {Patent bibliography 2}

Japanese Patent No. 3686903 {Patent Bibliography 3}

Japanese patent application open for inspection No. 1994-210361 {Patent bibliography 4}

Japanese Patent No. 2520095 {Patent Bibliography 5}

Japanese patent application open for inspection No. 1996-267162 {Patent bibliography 6}

International Publication No. WO 00/54905 {Patent Bibliography 7}

Japanese patent application open for inspection No. 1996-300082 {Patent bibliography 8}

Japanese patent application open for inspection No. 2002-45940 {Patent bibliography 9}

Japanese utility model application open for inspection No. 1988-78639

JP S63 78639 discloses a method for cutting a soft synthetic resin bar.

JP H09 225559 discloses a plate-connected structure and the structure mounted using it.

GB 768261 discloses an apparatus for grooving the end of metal bars.

US 4417493 A shows method for cutting steel plates.

US 215539 A shows a machine for dividing the ends of bars.

JP H04135031 shows the manufacture of a yoke element.

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US 1925721 A costs method of realization of the ends of a yoke.

US 4827612 A shows method for the realization of an electrical contact.

US 4,433,949 discloses a method according to the preamble of claim 1, while

US 4,909,763 discloses a method of division according to the preamble of claim 2.

{Summary of the invention}

On the contrary, if there is a method that is applicable to the longitudinal division of the end part of a metal plate that has any of a rectangular, polygonal, or elliptical shape, or a metal bar that has a cross-section of any of a circular, elliptical, rectangular, or polygonal shape, that is, not a circular metallic material such as a V-pulley or a brake shoe mentioned above, various applications of such method would be promising. For example, if a metal plate or a metal bar having a Y-shape shape, T-shape shape, or L-shape shape that can be manufactured simply by splitting, and pressure-molding Without subjecting it to a welding, fusion, or gluing process, a great reduction in manufacturing costs will be achieved through the reduction in the use of quantity of material and manufacturing workmanship. Additionally, an effect of significant improvement in the reliability of the joint or joint becomes attainable, which has been a problem in conventional methods such as welding, fusion, or gluing.

In addition, when a welding or fusion method is used in the joint between dissimilar metal plates, it is difficult to obtain a union with the appropriate quality due to the difference in the physical properties of metals such as electrical conductivity, thermal conductivity, or melting point. Therefore, even if adequate quality is obtained, its stability is not ensured because such methods create very brittle intermetallic compounds in the bonding interface. In the event that the connection between two dissimilar metal plates is made by gluing, low bond strength is inevitable due to the difference in the coefficient of linear expansion between the two; Therefore, ensuring a reliable union has been a fundamental problem. In contrast to this, the strength and reliability of the joint or joint will be greatly improved when performed in one way: dividing the end part of a first metal plate, or a first metal bar, inserting a second metal plate of dissimilar material between the Extremely divided areas of the first metal plate, or the first metal bar, to form a three-layer construction, and then perform the joint or joint with a conventional method.

Additionally, if a free adjustment of the length of division (or depth) in the divided area on the end of a metal plate or a metal bar becomes practicable, flexibility in the formation process will be increased. Consequently, the applicability of the invented method will be significantly expanded to the fields of precision parts, hard-to-process parts, and parts that require high reliability and durability.

However, the division methods described in the patent literature 1 to 5 listed above are to be applied to metal work pieces of circular metal plates or disk-like. In those methods, a cutter roller or an excision roller is pressed against the peripheral zone of the metal plate to divide that area with the roller rotating in synchronism with the rotation of the circular or disc-like metal plates. Therefore, the methods are not applicable to metal plates that have either a rectangular, polygonal, or elliptical shape, or a metal bar that has a cross section of any of a circular, elliptical, rectangular or polygonal shape. The rotation of the metal workpiece and the roller produces a uniform division up to a specified length (or depth) only when applied to a metal workpiece that is a metal plate having a circular or disk-like shape. In the case of a metal plate or a metal bar that has a style different from the circular or disk-like, however, it is not possible to obtain such an effect because it is impossible to achieve a uniform rotation of the work face.

In addition, patent literature 6 and 7 listed above describe an excision machinery that uses a cylindrical excision punch but in which the excision machine attempts to form a small tongue (or the formed area of a guide) for prevention of sliding of the V-belt. Therefore, the bibliographies do not describe or suggest a method for additionally dividing the pin (or the formed area of a guide) to a freely determined incision length. This means that the technique described in the literature does not recognize an active use of the divided metal zone as a constituent of a metal part.

The method described in the patent literature 8 listed above cuts the circumferential peripheral area of a cylindrical metal body with bottom using a cup die. In this process, the cylindrical body with bottom should be rotated so that a uniform dividing face is obtained. Therefore, this method is not applicable to metal plates or metal bars having any of a rectangular, polygonal, or elliptical shape, similar to the case mentioned above.

The invention described in the patent literature 9 listed above is a method for cutting the cross section of a relatively soft synthetic resin divider strip to divide the divider strip; The defined technique is different from the formation by division, cutting, or excision of a metal bar. This means that this invention has not recognized any technical aspect that could arise as a problem in the division of a

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cross-sectional end of a metallic material. Therefore, this technique cannot be applied to the division of the end of a metal plate or metal bar, as is the technique.

As stated above, there has been a strong desire for a method for the division, similar to a circular or disk-shaped metal plate, of an end portion of a metal plate having any of a rectangular, polygonal shape or elliptical, or an end part of a metal bar having any of a circular, elliptical, rectangular or polygonal cross-section, in the longitudinal direction with respect to the metal plate or the metal bar. Despite these wishes, few ideas have been proposed so far that allow a free adjustment of the incision length in the division zone and that provide smooth division faces.

The present invention is carried out to solve said problems and an object of the invention is to provide a method for dividing an end part of a metal plate having any of a rectangular, polygonal, or elliptical shape, or an end part of a metal bar having a cross section of any of a circular, elliptical, rectangular or polygonal shape, in the longitudinal direction with respect to the metal plate or the metal bar, in which the method allows a free adjustment of the incision length in the divided zone and provide smooth dividing surfaces.

Additionally, the present invention is directed to provide metal parts having a characteristic of high function and high added value manufactured by the method for the division of an end part of metal plate or metal bar established above, and to provide a method of joining of high strength and reliability metal parts.

The present inventors of the present invention have reached the present invention based on the finding that the problems set forth above can be solved by repeated pressing-splitting using a cutting punch or a splitting punch consecutively many times, not just once, in the cutting of an end part of a metal plate having any of a rectangular, polygonal, or elliptical shape, or an end part of a metal bar having any of between a circular, elliptical, rectangular or polygonal cross section , and by moving the position of a clamping device for the tightening of the metal plate or metal bar at each moment of the pressing-dividing operation so that the length of the incision in the division can be freely adjusted to the state optimized

That is, the configuration of the present invention is as follows.

(1) The present invention provides a method for dividing an end part of a metal plate having any of a rectangular, polygonal, or elliptical shape, or an end part of a metal bar having a cross section of any of a circular, elliptical, rectangular or polygonal shape according to claim 1.

(2) The present invention provides a method for dividing an area of the end part of a metal plate having any of a rectangular, polygonal, or elliptical shape, or an area of an end part of a metal bar having a cross section of any of a circular, elliptical, rectangular or polygonal shape, according to claim 2.

Preferred optional embodiments of the invention are defined in the dependent claims.

The application of the present invention makes it practicable to divide an end part of a metal plate having different shapes than the circular or disk-like shape, for example, any one of a rectangular, polygonal, or elliptical shape, or an end part of a metal bar having a cross-section of any of a circular, elliptical, rectangular, or polygonal shape, by performing the pressing-splitting of the end part of a metal material a number of times using a continuous cutting punch or punch Excision Furthermore, in the multiple pressing-division described above, it becomes practicable to freely adjust the length of the incision in the division within the desired range by adjusting the position of the clamping device for tightening a metal plate, or a metal bar , at each moment of the pressing-division operation. Additionally, an end division method can be developed, which has excellent productivity with reduced manufacturing costs, by continuously pressing-dividing with a feed direction in a specified path or with a progressive transfer method. Additionally, the application of the cutting punch or the splitting punch on the dividing position is easily done by performing in advance a groove cut or a nick line on at least any one of the metal plate or a periphery of the Metal plate that corresponds to the area to be divided from the metal bar, allowing a highly precise division of the end in a simple way. Moreover, the division by means of pressing-division develops along the groove cut or the indented line making the division of the end easy.

The fabrication of metal parts by the end splitting method of the present invention is compatible not only with freely changing the length of the dividing zone but also the adjustment

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freely from the thickness of the division to a desired thickness by changing the thickness ratio in the division plane or by machining for bending the divided area. In this way, it becomes possible to manufacture metal parts of high added value where it is difficult to manufacture them by the conventional method. In addition to the above, metal parts manufactured by the end-division method of the present invention are possible for the use of a new joining method that was unprecedented. For example, when a metal part is joined by the present invention with other metal parts, joining them in a state of a three-layer accumulation, in which the other metal part is intercalated, greatly increasing the bond strength and reliability of the Union. Therefore, the applicability of the joining method for metal parts of the present invention can be significantly expanded to fields that require additionally increased thermal resistance and additionally improved environmental resistance.

{Brief description of the drawings}

FIGS. 1A to 1D are an explanatory illustration of the stages of pressing-splitting in the first embodiment of the method for splitting the end portion of a metal plate, or a metal bar, in accordance with the present invention, in which the punch of Cut is used while moving the clamping device.

FIGS. 2A to 2D are an explanatory illustration of the stages of pressing-splitting in the second embodiment of the method for splitting the end portion of a metal plate, or a metal bar, in accordance with the present invention, in which the punch of Cut is used while moving the metal plate, or the metal bar. FIGS. 3A to 3D are an explanatory illustration of the stages of pressing-division in the third embodiment of the method for the division of the end part of a metal plate, or a metal bar, according to the present invention, in which the punch of Excision is used while moving the clamping device.

FIGS. 4A to 4D are an explanatory illustration of the stages of pressing-division in the fourth embodiment of the method for the division of the end part of a metal plate, or a metal bar, according to the present invention, in which the punch of Excision is used while moving the metal plate, or the metal bar.

FIGS. 5A and 5B are an explanatory illustration of the stages of the end-division method according to the present invention, in which the progressive transfer method is employed.

FIGS. 6A to 6C are an explanatory illustration of the stages of the method of splitting the end according to the present invention, in which a groove cut or a nick line on the metal plate, or the metal bar is provided in advance.

FIGS. 7A to 7D are an explanatory illustration of the stages of the division of the end part in the fifth embodiment of the present invention, in which the division of the end is performed with a cutting plane formed in the end part of the metal plate, or the metal bar, to create a division limit to partially divide.

FIGS. 8A and 8B are sectional views showing an example of the shape of the cutting edge of the cutting punch or the splitting punch used in the method of splitting the end of the present invention.

FIGS. 9A to 9F are an explanatory illustration of manufacturing steps of a metal part having a T-shaped shape manufactured by the sixth embodiment of the present invention.

FIGS. 10A and 10B are an explanatory illustration of manufacturing steps of a metal part having an L-shaped figure with raised edge made with the seventh embodiment of the present invention.

FIGS. 11A and 11B are illustrations showing a method of joining in the eighth embodiment of the present invention applied between the metal plate, or split-end metal bar, and the other metal plate.

{Detailed description of preferred embodiments}

To divide a part of the end of a metal plate that has shapes other than circular or disk-like, that is, any of a rectangular, polygonal, or elliptical shape, or a part of the end of a metal bar that has a section transverse of any of a circular, elliptical, rectangular or polygonal shape, the method of splitting the end by the present invention applies a pressing-splitting on the end portion of said metallic material a number of times continuously using a cutting punch or excision punch; This is the first feature. Additionally, the position of a clamping device for the tightening of the metal plate, or the metal bar, is adjusted at each moment of said multiple pressing-division operation to not only form a uniformly divided face but also to freely adjust the length incision of the divided zone; This is the second feature.

Unlike the division of metallic materials that have a circular or cylindrical shape such as a conventional-style V-pulley or brake shoe, the division of a part of the end of a metal plate that has any of a rectangular, polygonal shape , or elliptical, or a part of the end of a metal bar having a cross section of any of a circular, elliptical, rectangular or polygonal shape, as it is in the present invention, is not compatible with a method that applies a punch of cutting or a punch of excision for the creation of a plane of division in a rotary form, or with a method that processes a piece of metallic work such as a metallic plate, or a metallic bar, giving rotation to the piece of work. Additionally, what is formed by applying the pressing-splitting process using the cutting punch or the splitting punch to the end part of the metal plate, or the metal bar, simply once is a projection around a flange level ; It is therefore difficult to form a division of sufficient length (or depth). To do the division

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Longer, the use of a cutter instead of the cutting punch or excision punch could be an alternative method. However, cutting the end portion longitudinally with a cutter cannot avoid reducing the thickness on the metal plate, or on the metal bar, due to the thickness of the cutter used, which makes it difficult to apply the cutter-cut to a plate thin metal or a small diameter metal bar. In addition, the cut with a cutter not only invites the roughness of the split face attributable to the waste of the cut or decrease in work efficiency due to the generation of heat by fiction but also makes the processing complicated because said cut Requires cleaning of the split faces after cutting. Therefore, the present invention applies the pressing-division to the end part of the metal plate, or the metal bar, using a cutting punch or a splitting punch by repeating it consecutively many times until the divided area is extended (or deepened). The method for dividing a portion of the end of the present invention mainly comprises two processing phases described below.

The first processing phase comprises the steps of: securing a metal plate by tightening it from both sides of it with a clamping device or securing a metal bar by tightening at least two opposite facing areas on the periphery thereof with a clamping device; apply a cutting punch or an excision punch against the face of the cross section of one end of the metal plate, or the metal bar, to be divided; and divide the metal plate, or the metal bar, longitudinally by cutting or excision with a press-split. The second processing phase comprises the step of advancing the division by giving again the pressing-division with the cutting punch or the splitting punch in the groove of the division created in the first processing stage, in which this pressing operation -Division is made once or repeated two or more times until the specified interval length (or depth) of division is reached. In the first and second processing phases, the position of at least one side of the clamping device that squeezes both sides of the metal plate or that squeezes at least areas of two opposite faces on the periphery of the moving metal bar, in each moment of the pressing-dividing operation, advancing by a distance corresponding to the distance from one end of the metal plate, or the metal bar, to the distal end of an area to be divided. In this movement, it is preferable to adjust the position of the clamping device that squeezes the metal plate, or the metal bar, by moving a clamping device on at least one side of the clamping devices or the metal plate, or the bar metal, so that one end of the clamping device on at least one side of the clamping devices will be almost in the same position of the distal end of the area to be divided from one end of the metal plate or the metal bar. In this way, the split length can be adjusted at the end part of the metal plate, or the metal bar, within the specified range.

In the present invention, the rectangular shape means the shape of a square or a cuboid and the polygonal shape means shapes of polygons that have five or more sides or a triangle except the tetragon but including those variants that have irregular shapes; however, those polygons that have shapes close to circles, particularly those that have more sides than 12 sides, are excluded. A metal plate of an elliptical shape means a plate that has a long side A and a short side B at a ratio (A / B) of 1.2 or more. With regard to the metal bar of the present invention, a bar having a circular or elliptical cross-section is mainly used; however, a bar having a rectangular or polygonal cross-section can also be used as a metal workpiece.

The method of dividing the end of the present invention is a method for longitudinally dividing with respect to the metal plate, or the metal bar, which has the form set forth above. In the invention, the expression "divide longitudinally" means, in the case of the metal plate, that the division takes place in the direction of width or in the direction of depth, in which the workpiece is divided so that the dividing plane will extend within the thickness of the metal plate.In the case of the metal bar, the term means that the cross section of the metal bar is divided in the longitudinal direction of the bar.In addition, the method of splitting the end of the present invention, you can divide the cross section of the metal plate, or the metal bar, not only in equal sections but also in a desired section ratio depending on the form or function that the workpiece may require in completed formation. , not only the division into two sections, the cross section of the metal plate, or the metal bar, can also be divided into three or more sec In this case, the lengths (or depths) of the divisions may be the same or different from each other.

The present invention has no particular limitation to the material nature of the metal plate, or the metal bar, to which the invented end splitting method is applied. However, copper, aluminum, stainless steel, brass, and iron are suitable materials, because they have a wide range of applicability, large commercial needs as a high value-added metal product, and the ability to respond to a decrease demand. of manufacturing costs.

The following explains embodiments of the method of splitting the end by the present invention.

{First realization}

FIGS. 1A to 1D are an explanatory illustration of press-split stages in the first embodiment of the

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method for dividing the end portion of a metal plate 1, or a metal bar 2, according to the present invention, in which a cutting punch 4 is used while moving a clamping device 3. As FIGS illustrate . 1A to 1D, the method of dividing the end of the present embodiment comprises the steps of: securing the metal plate 1, or the metal bar 2, by tightening with the clamping device 3 (FIG. 1A); perform the pressing-division by applying the cutting punch 4 on the face of one end of the metal plate 1, or the metal bar 2 (FIG. 1B); moving the clamping device 3 to the position to be divided and restraining the metal plate 1, or the metal bar 2, by tightening with the clamping device 3 to secure it (FIG. 1C); and apply the cutting punch 4 on the groove of the divided zone to advance in the division by pressing-dividing (FIG. 1D). The steps illustrated in FIGS. 1C and 1D are repeated until the length (or depth) of division reaches the specified extent. Finally, the metal plate 1, or the metal bar 2, is shaped into a figure that has a dividing plane as illustrated in a perspective view in FIG. 1D. After that, the metal plate, or metal bar with the split end, is subjected to pressing-forming, crimping, or pressing-tightening to form as a metal product having a shape of, for example, a T-Figure, a Figure in L or Figure in Y.

In the stage illustrated in FIG. 1A, the metal plate 1 is secured by the clamping device 3 with both sides tightened and the metal bar 2 is secured by the clamping device 3 with at least two areas of opposite faces on the periphery of the same. The tightening of at least two areas of opposite faces on the periphery of the metal bar 2 makes firm the securing of the metal bar 2. In addition, said clamping device that maintains the entire circumference of the metal bar 2 can be used as a method to secure the metal bar 2.

In the stage illustrated in FIG. 1B, the division of the end of the metal plate 1, or the metal bar 2, using the cutting punch 4 is carried out in the position almost the same as the position of one end of the clamping device 3 that squeezes the metal plate 1, or the metal bar 2. In the area tightened with the clamping device 3, the breakage or excision of the fabric of the metal workpiece is avoided due to the compression tension generated by the clamping force caused by the clamping device 3 , which prevents the appearance of division during pressing-division by cutting punch 4. Therefore, the adjustment of the working position of the clamping device can freely control the division length. That "the position of one end of the clamping device 3 that squeezes the metal plate 1, or the metal bar 2, is almost the same as the position of the distal end of the area to be divided" means that a place in which one end of the clamping device 3 is located within the range of -3 mm to +1 mm, more preferably -1 mm to +0.5 mm, from the distal end of the area to be divided. place of -3 mm means the position at which the end A of the clamping device 3 indicated in FIG. 1B sits at a separate point 3 mm down from the distal end B of the area to be divided. on the contrary, the place +1 mm means the position in which the end A sits at a point 1 mm separated upwards from the distal end B; this means that the length of development of the division within the area tightened with the device clamping is 1 mm inwards from the position of the e xtremo A at a maximum. Therefore, the clamping device 3 also has a function to complete the development of the division.

In general, when the pressure in the press-split by means of the cutting punch 4 is high or the speed of application of the press-split is high, the positional deviation of the distal end of the zone of division of the end with respect to one end of the device Clamping 3 tends to get big. Such a state is not desirable, because the state motivates not only difficulties in adjusting the length (or depth) of division over the end of the division zone but also deformation of the metal plate 1, or of the metal bar 2 , and the ease for the appearance of tiny cracks at the distal end of the division. Additionally, if the division formation pressure is too low or the division formation speed is too low, the division is not fully achieved and results in a large positional deviation from one end of the clamping device 3. In addition to The foregoing in such cases, the problem arises that the efficiency of work in the division becomes low. Therefore, the present invention requires the optimization of the pressure and speed of formation of the division in the realization of the pressing-division so as to minimize the positional deviation of the distal end of the zone of division of the end with respect to one end of the clamping device 3. This means that bringing the position of one end of the clamping device 3 for tightening the metal plate 1, or the metal bar 2, to almost the same position as the distal end of the area to be divided It will be followed, as a result, by an adjustment in which the press-split conditions are optimized by the end-division method of the present invention. In this embodiment, the pressing-division is carried out under conditions in which the pressing load and the loading speed of the pressing are in a range of 1 to 10 tons and 1 to 50 mm / s respectively. In addition, in view of the balance between performance and cost of a press apparatus, it is preferable that the pressing load and the loading speed of the press be in a range of 2 to 5 tons and 2 to 10 mm / s respectively.

In the stage illustrated in FIG. 1C, the clamping device 3 moves to the position to be divided with the metal plate 1, or the metal bar 2, attached. In this embodiment, both sides of the clamping device 3 that press both sides of the metal plate 1, or that press at least two areas of opposite faces on the periphery of the metal bar 2, usually move simultaneously. The distance of movement may be the same as, or different from, that of the stage illustrated in FIG. 1A. In this operation, changing the conditions in the pressing load and the pressing loading speed in the press-split with the cutting punch 4 does not always

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it is necessary because these conditions have a margin to some degree. However, if a change in the distance of movement is likely to be large or an optimization of the press-split conditions is needed, those press-split conditions can be changed. After the movement, the clamping device 3 again holds the metal plate 1, or the metal bar 2, to secure it by tightening. The preferred range of movement distance in the steps illustrated in FIGS. 1A and 1B is 0.01 to 10 mm at a time, more preferably 0.5 to 5 mm. A movement distance of less than 0.01 mm is not preferable, because the division consumes a longer time motivating a significantly low efficiency at work. The distance of movement along 10 mm motivates a problem not only in that the deformation of the metal workpiece becomes large but also so that the cutting edge of the punch will be broken or worn out greatly. In the present invention, few problems such as those mentioned above will occur when the movement distance of the clamping device 3 is within the range of 0.5 to 5 mm.

In the stage illustrated in FIG. 1D following the above, the pressing-division is performed by applying the cutting punch 4 on the groove of the divided zone created in the step (B) set forth above to divide again. To further advance the division, the steps illustrated in FIGS. 1C and 1D are repeated until the length (or depth) reaches the specified extension. In the repetition of the steps illustrated in FIGS. 1C and 1D, the movement distance of the clamping device 3 can be a constant value, or instead, it can be changed at each stage. For example, to divide with high precision according to the design, the movement distance of the clamping device 3 can be made shorter, only in the last operation of the pressing-division, than that of the previous operation. Even if it is required to change the press-split conditions due to change in the length of division, an automatic control for the movement and clamping-clamping actions of the clamping device 3, the pressing-split conditions is applicable , or other working conditions using a control device such as a computer to capture in advance the relationship between the division length and the press-split conditions. This automatic control is applied to a method of dividing the end so that the division advances consecutively in one direction in a specified path, or to a method of dividing the end by progressive transfer, in which each of the stages in the pressing division is separated and aligned so that a plurality of pressing-division stages will be carried out progressively. In the present invention, the repetition of the pressing-division illustrated in FIGS. 1A to 1D can be applied not only to a method in which the repetition is performed consecutively with a unit of equipment or in a series of work processes, but also to a method in which the repetition is performed separately as an independent stage . In said application, the automatic movement control method of the clamping device 3 and the press-split conditions are still usable as a production control tool.

{Second embodiment}

FIGS. 2A to 2D are an explanatory illustration of the pressing-splitting steps in the second embodiment of the method for splitting the end portion of a metal plate 1, or a metal bar 2, according to the present invention, in which a cutting punch 4 is used while moving the metal plate 1, or the metal bar 2. In this embodiment, securing the metal plate 1, or the metal bar 2, by tightening with a clamping device 3 (FIG 2A) and the pressing-dividing embodiment by applying the cutting punch 4 on the face of one end of the metal plate 1, or the metal bar 2 (FIG. 2B), are the same steps as those of the first embodiment illustrated in FIGS. 1A and 1B. The difference with the stages indicated in FIGS. 1A and 1B is that the metal plate 1, or the metal bar 2 is moved, instead of moving the clamping device 3. The embodiment employs a stage, in which the metal plate 1, or the metal bar 2, is secured again by tightening with the clamping device 3 after the metal plate 1, or the metal bar 2, is moved to the position to be divided (FIG. 2C). Then, similar to the stage illustrated in FIG. 1D, the cutting punch 4 is applied on the groove of the divided zone to advance in the division by pressing-dividing (FIG. 2D) and repeating the steps illustrated in FIGS. 2C and 2D according to the length of division.

In the stage illustrated in FIG. 2C, the movement of the metal plate 1, or the metal bar 2, can be achieved by sliding a template for example, which supports the metal workpiece, by a distance that it is desired to divide. In that movement, the clamping device 3 for the tightening is slightly loosened and then affirmed to tighten again, after the metal plate 1, or the metal bar 2 has been moved. Additionally, the cutting punch 4 should be retracted. in advance so as not to impede the movement of the metal plate 1, or of the metal bar 2. This obstruction impediment can also be achieved by clearing the space between the metal plate 1, or the metal bar 2, fastened and the cutting punch 4 in advance of the stage illustrated in FIG. 2C, which allows the metal plate 1, or the metal bar 2, to move successively without obstruction. It should be noted that the steps illustrated in FIGS. 2A, 2B and 2C are basically the same as the steps indicated in FIGS. 1A, 1B and 1C, therefore, the division of the end is done in a way that corresponds to the explanation of the first embodiment. In this embodiment, the distance of movement of the metal plate 1, or the metal bar 2, is the same as that specified in the first embodiment for the interval of a movement of the clamping device 3.

{Third embodiment}

FIGS. 3A to 3D are an explanatory illustration of the press-split stages in the third embodiment of the

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method for dividing the end portion of a metal plate 1, or of a metal bar 2, according to the present invention, in which a cleavage punch 5 is used while moving a clamping device 3. How to illustrate In Figures 3A to 3D, the method of splitting the end of this embodiment comprises the steps of: securing the metal plate 1, or the metal bar 2, by tightening with the clamping device 3 (FIG. 3A); perform the pressing-division by applying the cleavage punch 5 on the face of one end of the metal plate 1, or the metal bar 2 along one face of the clamping device 3 on one side (Figure 3B); move one side of the clamping device 3, which is disposed on the other side of the face on which the clamping device 3 indicated above is arranged, to the position to be divided and held again the metal plate 1, or the metal bar 2, by tightening with the clamping device 3 to secure it (FIG. 3C); and apply the splitting punch 5 on the groove of the divided zone to advance in the division by pressing-dividing (FIG. 3D). The steps illustrated in FIGS. 3C and 3D are repeated until the length (or depth) of division reaches the specified extent. Finally, the metal plate 1, or the metal bar 2, is shaped into a figure that has a dividing plane as illustrated in a perspective view in FIG. 3D After that, the metal plate, or metal bar with the split end, is subjected to pressing-forming, crimping, or pressing-tightening to form as a metal part having a shape of, for example, a T-figure, a L figure, or a Y figure.

In the stage illustrated in FIG. 3A, the metal plate 1 is secured by the clamping device 3 with both sides tightened and the metal bar 2 is secured by the securing device 3 with at least two areas of opposite faces on the periphery of the same. The tightening of at least two areas of opposite faces on the periphery of the metal bar 2 makes the fastening of the metal bar 2 firm. In addition, a clamping device that maintains the entire circumference of the metal bar 2 can be used as a method to secure the metal bar 2. In the method of splitting the end using the cleavage punch 5, in this embodiment, placing the metal plate 1, or the metal bar 2, in the plane facilitates processing. Therefore, the clamping device that is arranged under the workpiece can have a flat bottom. Additionally in the present embodiment, fixing one side of the clamping device 3 (the clamping device that is arranged on the lower side in FIGS. 3A to 3D), the other side of the clamping device that is arranged on the other side of The face (the clamping device that is disposed on the upper side in FIGS. 3A to 3D) can be configured in a mobile style. In this way, the movement of the clamping device 3 becomes easy and, in addition, the positioning accuracy at the distal end of the area to be divided on the metal plate 1, or the metal bar 2 is improved. Similarly , the clamping device 3 moves in the stage illustrated in FIG. 3C. In this movement, the distance of movement may be the same as that of the stage illustrated in FIG. 3A or it may be different. For the same reason as indicated in the first embodiment, the preferred range of movement distance in an instant is 0.01 to 10 mm, more preferably 0.5 to 5 mm.

In the stage illustrated in FIG. 3B, the division of the end of the metal plate 1, or the metal bar 2, using the cleavage punch 5 is made at the position almost the same as the position of one end of the clamping element of the clamping device 3 on one side which tightens the metal plate 1 or the metal bar 2. In FIG. 3B, in the tight area between the upper element of the clamping device 3 and the lower element of the clamping device 3, the breakage or excision of the fabric of the metal workpiece is suppressed due to the compression stress generated by the force of tightening caused by both elements of the clamping device 3, which prevents the appearance of division during the pressing-splitting of the splitting punch 5. On the other hand, the area not pressed by the upper element of the clamping device 3 can be divided due to that the area does not receive a clamping force. Therefore, the adjustment of the working position of the clamping device 3 can freely control the dividing length. That “the position of the end of the clamping device that squeezes the metal plate 1, or metal bar 2, is almost the same as the position of the distal end of the area to be divided” means, since it is the same as in the First embodiment, that a place where one end of the clamping device 3 sits within the range of -3 mm to +1 mm, more preferably -1 mm to +0.5 mm, from the distal end of the area that you want to divide. Additionally, the press-split conditions in this embodiment employ a similar range of the press load and the press load speed than those of the first embodiment. In the stage illustrated in FIG. 3D, the pressing-division is done with the punch 5 under similar conditions. It is not always necessary to change the conditions of the pressing load and the pressing loading speed in the pressing-splitting with the splitting punch 5 with respect to those of the stage illustrated in FIG. 3B because these conditions have room to some degree. However, if a large change in the distance of movement is intended in the stage illustrated in FIG. 3B with respect to the initial length or if an optimization of the press-split conditions is needed, said press-split conditions can be changed.

The method of splitting the end illustrated in FIG. 3A to 3D is able to position and secure the area of division of the end of a metal plate, or a metal bar, easily with high precision using the clamping device 3 arranged at the bottom; therefore, the division of the end part into a thin thickness becomes practicable. Additionally, not only a simple division into two zones but also a division into multiple zones three or more, is easily achieved by dividing a zone into a zone from the top to the bottom. Therefore, the method has an advantage of being able to manufacture metal parts applicable to various uses.

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{Fourth embodiment}

FIGS. 4A to 4D are an explanatory illustration of the stages of pressing-splitting in the fourth embodiment of the method of splitting the end piece of a metal plate 1, or a metal bar 2, in accordance with the present invention, in which use a split punch 5 while moving the metal plate 1, or the metal bar 2. The method of splitting the end in this embodiment comprises the steps of: securing the metal plate 1, or the metal bar 2, by tightening with a clamping device 3 (FIG. 4A); and perform a press-split, applying the cleavage punch 5 on the face of one end of the metal plate 1, or the metal bar 2, along the face of the clamping device 3 on one side (FIG. 4B) , which is the same as in the steps illustrated in FIGS. 3A and 3B. The difference with respect to the steps illustrated in FIGS. 3A and 3B is that the metal plate 1, or the metal bar 2, moves, instead of moving the clamping device 3 on one side. This embodiment employs the stage illustrated in FIG. 4C by moving the metal plate 1 or the metal bar 2, together with one side of the clamping device 3 securing the lower side of the metal plate 1, or the metal bar 2, to the position to be divided and then pressing again to secure the metal plate 1, or the metal bar 2, with the clamping device 3 securing the upper side of the metal plate 1, or the metal bar 2. In the stage illustrated in FIG. 4C, a method for first movement of the clamping device 3 can be employed by securing the bottom side to create a slack in the upper part of the metal plate 1, or the metal bar 2, and then move the metal plate 1, or the metal bar 2. Following the above, the stage illustrated in FIG. 4D that performs the pressing-division by applying the cleavage punch 5 on the groove in the divided face to advance in the division progresses in a manner similar to that illustrated in FIG. 3D Next, the steps illustrated in FIGS are repeated. 4C and 4D according to the desired division length.

In the stage illustrated in FIG. 4C, the movement of the metal plate 1, or the metal bar 2, can be achieved by sliding a template for example, which supports the metal workpiece, by a distance that it is desired to divide. In that movement, the clamping device 3 for tightening is slightly loosened and then affirmed to tighten again, after the metal plate 1, or the metal bar 2 has been moved. Additionally, the cleavage punch 5 should be retracted. in advance so as not to impede the movement of the metal plate 1, or of the metal bar 2. This obstruction impediment can also be achieved by clearing the space between the metal plate 1, or the metal bar 2, fastened and the cutting punch in advance to the stage that allows the metal plate 1, or the metal bar 2, to move successively without obstruction. It should be noted that the steps illustrated in FIGS. 4A, 4B and 4C are basically the same as the steps indicated in FIGS. 3A, 3B and 3C, therefore, the division of the end is done in a way that corresponds to the explanation of the third embodiment. In this embodiment, the distance of movement of the metal plate 1, or the metal bar 2, is the same as that specified in the third embodiment for the interval of a movement of the clamping device 3.

Next, the following explains a method of splitting the end by the present invention with improved productivity in each of the first to fourth embodiments. The method employs a sequential pressing-division operation.

For the steps illustrated in FIGS. 1 to 4, an operation that covers the movement of both or one side of the clamping device 3 by means of a path corresponding to the specified length of division in one direction and then pressing and dividing on the end part of the metal plate 1, or the metal bar 2, is defined as a stage. This method of division of the end repeats sequentially and automatically that step to advance in the division of the end until the division finally reaches the desired length (or depth). In this method, instead of moving the clamping device 3, it can be used to continuously and automatically move the metal plate 1, or the metal bar 2, which is a metal workpiece, in a specified path to perform the steps (A) a (D) illustrated in FIGS. 1 to 4 sequentially in one direction. In this processing, the position of the cutting punch 4 or the splitting punch 5 is regulated before the start of pressing-splitting by a computer using a position sensor as specified. In the same way, both sides or one side of the clamping device 3 is also automatically controlled to move to the specified position. Additionally, as previously explained, in the case in which it is required that the pressing-division conditions be changed due to the change in the division length, an automatic control for the movement and tightening-holding actions of the device is applicable. of clamping 3, the press-split conditions, or other working conditions using a control device such as a computer by capturing in advance the relationship between the split length and the press-split conditions.

As another method for the division of the end by means of a sequential pressing-division operation, a manufacturing configuration in progressive transfer line can be cited. The press-split stages illustrated in FIGS. 1 to 4 are separated into a single processing stage and are arranged in an in-line configuration of a serial processing arrangement, in which various stages are progressively performed in the press-split operation. The steps in the method of dividing the end by progressive transfer with reference to FIGS are explained below. 5A and 5B. The method of splitting the end illustrated in FIGS. 5A and 5B is an example, in which the splitting of the end is performed by pressing-splitting using a cutting punch 4. In the steps of the method for splitting the end portion of a metal plate 1, FIG. 5A and FIG. 5B are a plan view and a side view respectively.

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The method of dividing the end by progressive transfer performs the division of the end part of a metal plate as illustrated in FIGS. 5A and 5B. In the method, a long metal material 6 having a specified thickness is intermittently fed. In the first processing stage, a rectangular metal plate 1 is formed, then in the second stage, the metal plate 1 is tightened with a clamping device 3 and is subjected to the first division of the end part into the Pressing-dividing processes by means of the cutting punch 4. In the third and subsequent stages, the metal plate 1 experiences the movement of the clamping device 3 and is tightened again with the clamping device 3 after this movement to undergo the pressing -division using the cutting punch 4. Thus, the division of the end part of the metal plate progresses. For simplicity, FIGS. 5A and 5B illustrate about the stages until the fifth phase. In the present invention, however, the number of processing phases after the third phase can be changed and the total number of processing stages and the length of the long metallic material 6 can be determined according to the length of division by stage and the last division length to complete the division processes. The length of the long metallic material 6 changes depending not only on the number of processing steps in the pressing-splitting, but also on the shape of the metal plate 1, machining method, shape of the processing mold, or other factors. The long metallic material 6 is cut into pieces for successive final processing or cut into pieces after the final processing.

In the intermittent feeding of the long metallic material 6 illustrated in FIGS. 5A and 5B, the insertion of a mold pin into a gear hole 7 causes the long metal material 6 to be placed in position and prevents a backward slide from occurring during pressing-splitting and processing. Additionally, the metal plate 1, after being processed in a rectangular shape in the first phase illustrated in FIGS. 5A and 5B, can be subjected to bending at right angles in the second phase, and then to the first division of the end part in the third phase, and additionally then, it can be passed to the division of the end by means of the splitting punch 4 in the fourth or subsequent phases. Furthermore, the present invention can employ a simultaneous application of the same processing on the plurality of metal plates by supplying the long metal material 6 intermittently in batches of two or more quantities of the metal plate 1, not an intermittent feed one at a time. Additionally, the long metallic material 6 can be subjected to the splitting of the end being fed into a form of conduction frame feed by dividing processing steps into a conduction frame that handles the long metallic material 6 as a conduction frame. The progressive transfer method illustrated in FIGS. 5A and 5B is a press-split with a cutting punch; The present invention can employ the same progressive transfer method in the case of pressing-splitting with a split punch.

As indicated above, by performing press-splitting with a cutting punch or a splitting punch consecutively in one direction or in a progressive transfer method in a specified path, an end splitting system can be established having a excellent productivity with reduced manufacturing costs.

The method of dividing the end of the present invention can employ a means explained below to increase the processing speed and to form a smooth dividing face.

As FIG. 6A, the means are such that a cutting groove 8 or a nicking line 9 is made in advance on at least one of the locations in the peripheral area of the end part of the metal plate 1, or the metal bar 2, in which the places are a place where the cutting punch or the splitting punch is applied and a peripheral place of the metal plate 1, or the metal bar 2, which corresponds to the area to be divided from the plate metal 1, or metal bar 2. The groove cut 8 made in the method of splitting the end by the present invention is formed from the surface of the metal plate 1, or the metal bar 2, to a deeper depth that the width of the metal plate 1, or not deeper than 1/5 of the diameter of the metal bar 2; that is, the groove cut 8 does not indicate a cut plane. Slot cutting 8 or nicking line 9 can be done automatically in advance using a grater, cutter, die, or other known tool. It is also possible to form a cutting groove using a chemical. In this method, a marking line is scratched and a trace amount of a chemical or similar is applied on the scratched line, then the metal chemical application zone will partially dissolve creating a cutting groove.

By performing the aforementioned cutting groove 8 or the nicking line 9 on the dividing position in the cross section of the metal plate or the metal bar, the application of the cutting punch 4 or the splitting punch is facilitated ( not illustrated) on the division position allowing a highly precise division of the end in a simple way. Additionally, the formation of the groove cut 8 or the nick line 9 on the periphery of the metal plate 1, or the metal bar 2, as illustrated in FIGS. 6B and 6C, performs the development of the division by pressing-dividing with the cutting punch along the cutting groove 8 or the nicking line 9 facilitating the division of the end. In this case, the formation of the cutting groove 8 or the nicking line 9 at the distal end of the area to be divided makes it possible to give a limitation to the length (or depth) of division to a desired length in advance.

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{Fifth embodiment}

FIGS. 7A to 7D illustrate the steps in a method for partially dividing a part of the end of a metal plate 1, or a metal bar 2, by pressing-dividing with a cutting punch 4. In this embodiment, to partially divide the part of the end, a cutting plane is provided perpendicular to the dividing face in the cross section of a metal plate, or a metal bar. First, a cutting plane 10 is formed in the direction of the thickness of the metal plate 1. Next, the cutting punch 4 is applied over the cross-section that is desired to partially divide the metal plate 1 over the boundaries of the plane of section 10 to perform the first processing in the press-split (FIG. 7A). At that time, two positions are pressed on both sides of the area to be divided from the metal plate 1 with a clamping device 3. Next, the pressing-division with the cutting punch 4 progresses and finally both are partially divided sides of the metal plate 1 over the limits of the cutting plane 10 (FIG. 7B).

Partial division of the end part of the metal bar is basically done in the same stages as in the metal plate. After the formation of a cutting plane 10 in the direction of the diameter of the metal bar 2, the cutting punch 4 is applied over the area to be partially divided from the metal bar 2 over the limits of the cutting plane 10 to perform the first processing in the pressing-division (FIG. 7C). At that time, two positions are pressed on the periphery of the area that is partially divided from the metal bar 2 with the clamping device 3. Next, the pressing-splitting progress with the cutting punch 4 and finally partially divided both sides of the metal bar 2 above the limits of the cutting plane 10 (FIG. 7D).

In this embodiment, the formation of the cutting plane 10 at the distal end of the area to be partially divided makes it possible in each case of a metal plate or a metal bar to give in advance a limit of the length (or depth) of division Up to a desired length. Instead of the cutting punch illustrated in FIGS. 7A to 7D, an excision punch can be used. In addition, in the case of the metal plate, when the cutting plane is formed in the middle part of the thickness of the metal plate, for example at a distance of 1/2 of the thickness and at a length of 1/2 of the depth of the metal plate 1, the partial division can be done with a tearing style only on a rectangular area of the metal, one of whose sides is the cutting plane (the part that is approximately an area 1/8 of the metal plate such as is illustrated in FIG. 7B). In the same way, in the case of the metal bar, when the cutting plane is formed in the middle part in the direction of the diameter of the metal bar such as the distance to the center of the metal bar 2 and to a length of 1 / 2 of the metal bar 2, the partial division can be done with a tearing style only on an area of the metal quadrant, one of whose sides is the cutting plane (the part that is approximately 1/8 of the area of the metal bar as illustrated in FIG. 7D).

The method of splitting the end of this embodiment illustrated in FIGS. 7A to 7D may, in the partial division of each part of the end after the formation of the cutting plane over the division limits at the end part of the metal plate, or the metal bar, employ the sequential pressing-division operation as stated above. Sequential pressing-division can employ a method in which the metal plate, or the metal bar, moves in a specified path or the progressive transfer method composed of separate stages as illustrated in FIGS. 5A and 5B to progress the processing. In this, the cutting stage for the creation of the dividing limits on the end part of the metal plate, or the metal bar, can be combined with a pressing stage in a series of stages. In this way, the improvement of productivity and the reduction of manufacturing costs can be achieved.

In the present invention, the conformation of the cutting edge of the cutting punch or the splitting punch in the manner as illustrated in FIGS. 8A and 8B for example can be another method to not only increase the speed of the press-split but also to form a uniform dividing face. FIGS. 8A and 8B illustrate cross sections of a cutting edge 11 of the cutting punch and a cutting edge 12 of the splitting punch.

To the cutting edge illustrated in FIGS. 8A and 8B there is a spindle shape having at least two sloping zones of different angle or curvature, in which the slope is provided on both sides in the case of the cutting punch and on one side in the case of the punching cleavage. Additionally, the sloping area of the side near the pointed end of the cutting edge is formed to have a smaller angle or curvature than that of the slope on the side separated from the pointed end of the cutting edge. In this case, the angle of the cutting edge, as illustrated in FIGS. 8A and 8B, means the angle of inclination (02 and 0i) of the cutting edge from the horizontal line based on the definition that the inclination of the horizontal line is zero degrees.

In the case of a cutting edge that has a spindle-shaped area, the problem arises because the formation of a flat and smooth dividing face will be prevented, because the part of the metal end separated in two can touch the face side of the cutting edge when the division progresses causing the roughness of the division face. Additionally, work efficiency may sometimes be lower if the part of the metal end separated by the division touches the cutting edge, because each touch prevents the smooth behavior of the part of the separated metal end. This is a particularly serious problem in performing press-splitting continuously. In addition, in the case where the spindle-shaped area near the cutting edge has a greater angle or a

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greater curvature compared to the inclined area separated from the cutting edge, a problem also arises so that the part of the metal end separated in two touches the side face of the cutting edge, which is not desirable.

In the method of dividing the end by the present invention, a cutting punch or a splitting punch is usable, the cutting edge of each of which has a spindle-shaped area. It is preferable, however, to use a punch having a cutting edge in the manner illustrated in FIGS. 8A and 8B to improve work efficiency. Additionally, it is preferable to apply a super-hardening treatment to the cutting edge of the cutting punch or the cleavage punch to be used in the present invention for increased strength or hardness. As the super-hardening treatment, a surface treatment such as cementation, nitriding, spraying, diamond-type carbon treatment, and TiCN treatment may be applicable.

{Sixth embodiment}

The following describes a T-shaped metal part as an example of metal parts made of a metal plate, or a metal bar, manufactured by the method of splitting the end of the present invention. FIGS. 9A to 9F are an explanatory illustration of the steps for manufacturing the T-shaped metal part using the metal plate processed by splitting the end.

A metal plate 1 with a clamping device 3 (FIG. 9A) is tightened, and then, in the same way as in the second embodiment, it is repeatedly subjected to pressing-splitting with a cutting punch 4 (FIGS. 9B and 9C ) in the longitudinal direction (in the vertical direction in FIGS. 9A to 9F) with respect to the metal plate 1 until the end of the dividing zone reaches the specified length (or depth). Next, half of the end of the divided metal is folded toward the center from the periphery using a press die for bending 13 by applying the die so that the end of the metal divided in two will be surrounded (FIG. 9D). Additionally, a press die for pressing 14 is applied from the top to make the surface of the metal plate 1 flat, which is crimped if necessary (FIG. 9E). Thus, the metal part is manufactured in the form of a T-figure 15 (FIG. 9F).

The split metal end of the T-shaped metal part 15 folds double and forms as flat; therefore each zone of it is almost the same thickness (see the illustration on the left side of FIG. 9F). In the conventional cutting method, it is impossible to make the thickness of the area with two folds of the divided metal end equal to the thickness of the metal plate before division due to the reduction of thickness in the cutting area. The application of the method of splitting the end of the present invention makes it possible to easily manufacture a metal piece in the shape of a T-shape that is almost the same thickness in each area thereof from the same metal plate as in the metal parts manufactured using bonding by welding, fusion, or adhesion. Therefore, a reduction in manufacturing costs and reduction in the use of the amount of metallic material can be realized. Additionally, since the zone is not attached or adhered, the T-shaped metal part by the present invention has increased reliability and durability; therefore, the metal part can be used in parts of high added value such as mounts, support bases, or connection paths that have high thermal resistivity and excellent environmental resistance.

FIGS. 9A to 9F illustrate said processing steps as folds on both sides of the metal end divided into two folds. In the present invention both of the split metal end sides can be folded with two folds (see the illustration on the right side of FIG. 9F). In the realization of the two folds, the fold lengths are not necessarily equal to each other; The lengths can be changed according to the use of the metal parts. The fold style is not limited to two folds; three or more folds are practicable. Additionally, both sides of the divided metal end can be divided into different thicknesses.

FIGS. 9A to 9F illustrate an example of the manufacture of T-shaped pieces using a method of splitting the end of a metal plate; however, metal parts in the shape of a T-shape can be manufactured using a metal bar with the same processing steps. The backward bending zone of the divided metal end may be in a body such as by welding, fusion, or adhesion.

{Seventh embodiment}

FIGS. 10A and 10B are an explanatory illustration of the steps for manufacturing a metal part 17 to be used as a metal base of an air tight container, in which the metal part 17 is manufactured by fastening the metal cover 16 with resin on the metal base using any one of the methods: pressing-forming, welding, melting, and adhesion.

As in the third or fourth embodiment set forth above, the workpiece is formed to have a raised visor by pressing-splitting with a split punch, and then the raised visor is pressed or dragged with a pressing die in a form of L figure (FIG. 10A). Next, the metal or resin cover 16 is installed on the periphery of the metal part 17 having a raised visor 18 in the form of an L-shaped figure, which is followed by a pressing process so that a hollow container will be manufactured air tight (FIG. 10B). As a method of fastening the cover 16 on the metal part 17, it may be practical not only a

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pressing-forming but also bonding by welding or fusion, or adhesion. In this, electronic parts or mechanism elements are mounted in the center of the metal part 17 which has the raised visor 18 in the form of an L-figure in advance of the installation of the metal or resin cover 16. When necessary, electrodes and electrode wiring can be provided that allow electrical connection to external terminals.

The metal parts of this embodiment may have an elongated division zone. Therefore, a wider space can be created in the flat area formed by dividing in two (the part represented by the number 19 in FIG. 10A). This means that a space for the installation of screws or rivets can be secured in the assembly of the air-tight hollow container on another board or base part. Additionally, operations such as pressing-forming, welding or fusion joining, or adhesion that are performed when the metal or resin cover 16 is installed are facilitated, because the length of the raised visor 18 shaped can be assured to some degree of figure in L.

The metal part manufactured in the fifth and sixth embodiments set forth above is usable after post-processing applied to the part of the divided end of the metal with the face thereof as it has been processed. If necessary, however, an anti-corrosion coating layer can be formed at least on the divided face by any method of metallic coating, organic coating, inorganic coating, or chemical conversion treatment. This corrosion protection can be formed not only to give corrosion resistance against rust but also to improve durability, thermal resistivity, or lubricity, or surface preparation. Additionally, such treatments are sometimes applied in order to give the metal plate, or the metal bar, a new function such as a resistance against fingerprints, antibacterial, and resistance to washing.

The metal coating, such as the anticorrosion coating set forth above, is formed by, for example, hot-dip plating using such as Zn, Al, Pb, Sn-Fe; or electro-plated using such as Zn, Ni, Cr, Cu, Sn, Au; or silver without electrodes using such as Cu, Ni, Sn; or dry coating by physical or chemical deposition; flame spray, etc. The inorganic coating includes such as ceramic, vitrified or glazed coating. The organic coating includes such as paint, lamination, or resin. Chemical conversion treatment includes phosphate treatment, chromate processing, oxidation, and anodic oxidation. In the implementation of the present invention, it is preferable to maintain a smooth and uniform dividing face to provide an inorganic coating anticorrosion coating layer by electro-plating or plating without electrodes or to form the same by chemical conversion treatment by chrome plating processing .

{Eighth embodiment}

FIGS. 11A and 11B illustrate a method for attaching a metal plate 1, or a metal bar 2, which is divided by the method of dividing the end of the present invention, to another metal plate 20. FIG. 11A illustrates a method for joining that is made with another metal plate 20 inserted between the divided metal plate 1, or the divided metal bar 2; FIG. 11B illustrates a method for joining that is performed by inserting the divided zone of metal plates so that they are intercalated with each other.

In this embodiment, the joining of the metal plate 1, or the metal bar 2, which is divided, to another metal plate 20 can be carried out by either pressing (including crimping), welding, melting, screwing, riveting, and gluing. These methods can be used by combining two or more methods, for example, such as pressing and gluing, screwing and gluing, or riveting and gluing. The joining by gluing is carried out as follows: glue is applied between the divided metal plates, or the divided metal bars, then the glued areas are pressed; In the press state, the glued areas are heated so that the tail curing progresses. Or instead, the zones are heated to melt the glue and then cooled to form a uniformly applied glue layer and then the bonding process is continued. The joint can also be implemented in such a way that another metal plate, whose surface has a glue applied, is inserted between the divided metal plate, or the divided metal bar, and then said area is heated to be joined.

Normally, it is difficult to obtain a joint with adequate quality in the joint between dissimilar metal plates. Even if an adequate bonding quality is initially obtained, its stability is not ensured because said method creates very brittle intermetallic compounds in the bonding interface. In the case where the connection between two dissimilar metal plates is made by gluing, low bond strength is inevitable due to the difference in the coefficient of linear expansion between the two; thus, ensuring a reliable union has been a fundamental problem. In contrast to this, the strength and reliability of the joint or joint will be greatly improved when performed in the manner as illustrated in FIG. 11A: dividing the end part of the metal plate 1, or the metal bar 2, insert the other metal plate 20 of dissimilar material between the divided area of the end of the metal plate 1, or the metal bar 2, to form a construction in three layers, and then make the joint or joint with a conventional method. Additionally, as FIG. 11B, a high bond or joint resistance can also be obtained by means of the joining method such that the end part of the metal plate 1, or the metal bar 2, made of two kinds of dissimilar metals are divided and then said divided ends they are inserted so that they are interspersed with each other; this can improve the

reliability of the strength of the joint or joint.

As set forth above, the present invention makes it practicable to divide a part of the end of a metal plate having either a rectangular, polygonal or elliptical shape or a part of the end of a metal bar having a cross section of any of between a circular, elliptical, rectangular or polygonal shape. In multiple pressing-division, it becomes practicable to freely adjust the length (or depth) of the split incision within the desired range by adjusting the position of the clamping device for tightening a metal plate, or a metal bar , at each moment of the pressing-division operation. Additionally, the method of splitting the end by the present invention is capable of continuously performing the pressing-splitting with a cutting punch or a splitting punch. This means that the invented method has excellent productivity and at the same time offers reduced manufacturing costs. In addition to the above, the fabrication of metal parts by the method of splitting the end of the present invention is compatible not only with freely changing the length of the dividing zone but also with freely adjusting the dividing thickness to a desired thickness. In this way, it becomes possible to manufacture metal parts 15 of high added value that were difficult to manufacture by the conventional method. Moreover, metal parts manufactured by the end-division method of the present invention are feasible for the use of a new joining method that was unprecedented. Therefore, the application of the present invention can be significantly expanded to fields that require increased thermal resistivity and additionally improved environmental resistance.

twenty

The method of dividing the end, the metal parts manufactured by said method of dividing the end, and the method for joining said parts by the present invention are applicable to various applications such as automobiles, transport equipment such as railroad equipment such such as rolling stock, electronic devices, machine tools, heavy electrical machinery, nuclear related equipment, and leading edge equipment in fields such as aviation or space technology. Therefore, the utility of the present invention is extremely high.

Claims (10)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. A method of dividing a part of the end of a workpiece in the longitudinal direction with respect to the workpiece, in which the workpiece is a metal plate (1) having any of a rectangular shape, polygonal or elliptical, or a metal bar (2) having a cross section of any of a circular, elliptical, rectangular or polygonal shape, where the method comprises the stages of firmly secure the workpiece by tightening both sides of the metal plate (1), or at least two areas of opposite faces on the periphery of the metal bar (2), with a clamping device (3); divide the work piece lengthwise by pressing with a cutting punch (4) or a splitting punch (5) against the face of one end of the work piece; advance the division of the workpiece further by applying the pressing operation with the cutting punch (4) or the splitting punch (5) against the dividing groove once more or repeatedly two or more times until the division length reaches a specified extension, characterized by that, between each pressing-division operation, the position of at least one side of the clamping device (3), which squeezes both sides of the workpiece, relative to the workpiece in a longitudinal travel corresponding to the distance from the position of the groove of the division is moved to almost the same position at the distal end of the area that you want to divide. 2. A method for partially dividing an area of a part of the end of a workpiece in the longitudinal direction with respect to the workpiece, in which the workpiece is a metal plate (1) having any one of a rectangular, polygonal, or elliptical shape, or an area of a metal bar (2) having a cross section of any of a circular, elliptical, rectangular or polygonal shape, where the method comprises the stages of forming a desired length of the cutting plane (10) in the direction of the thickness of the metal plate (1) or in the direction of the diameter of the metal bar (2); apply a cutting punch (4) or a splitting punch (5) over the cross section of the end to be divided from the metal plate (1), or the metal bar (2), over a boundary created by the plane of cut (10); securely secure the work work piece with a clamping device (3) by tightening both sides of the area to be divided from the metal plate (1) or at least two areas with opposite faces on the periphery of the area that it is desired to divide from the metal bar (2); Partially divide the workpiece lengthwise, by pressing it with a cutting punch (4) or a splitting punch (5) against the face of one end of the workpiece; advance the division of the workpiece further by applying the pressing operation with the cutting punch (4) or the splitting punch (5) against the groove of the partial split once more or repeatedly two or more times until the length of the partial division reaches a specified extension, characterized by that, between each pressing-division operation, the position of at least one side of the clamping device (3) is moved, which squeezes both sides of the area to be divided from the workpiece, relative to the workpiece in a longitudinal travel corresponding to the distance from the position of the groove of the division to almost the same position at the distal end of an area to be divided; Y in this way the workpiece is partially divided in the longitudinal direction along the cutting plane (10). 3. The method of dividing a part of the end of the workpiece, according to claim 1 or claim 2, in which the adjustment in the positioning to determine division details is made by movement or of the clamping device (3) on at least one side of the clamping devices or of the workpiece, so that one end of the clamping device (3) on at least one side of the clamping devices will reach almost the same position of the distal end of the area that is to be divided from one end of the workpiece. 4. The method for dividing a part of the end of the workpiece according to any one of claims 1 to 3, in which the pressing-division is performed by pressing the cutting punch (4) or the splitting punch (5) against the face of one end of the workpiece and against the groove of the division, repeating assurance operations of the workpiece using the clamping device (3) after moving any of the clamping devices (3) on at least one side of the clamping devices of the workpiece, by a path specified in one direction. 5. The method for dividing a part of the end of the workpiece, according to any one of claims 1 to 4, in which a groove cut (8) or a nick line (9) is made in advance on at least one of the locations in a peripheral area of the end part of the workpiece, where the places are a place to which the cutting punch (4) or the splitting punch (5) is applied and a place 5 10 fifteen twenty 25 30 35 40 Four. Five peripheral of the workpiece that corresponds to the area that you want to divide from the workpiece. 6. A method for manufacturing a metal part in the shape of a T-figure (15), in which the method comprises: dividing one end of a workpiece by the method defined by any one of claims 1 to 5, fold the edge area of one side or both sides at the dividing end of the workpiece, towards the center; Y subject it to pressing-forming or crimping so that said folded area is flat. 7. A method for manufacturing a metal part to be used as a metal base (17) of an air tight container where the method comprises: divide an area of the edge of the circumference of a metal plate by the method defined in a any of claims 1 to 5; forming the edge area (18) as an L-shaped figure; thereby forming a raised visor to be used for joining or connecting to a cover (16) made of metal or resin on the periphery of the metal plate (1); Y manufacture the cover (16) on the metal base (17) by any method of pressing-forming, welding, melting and gluing. 8. A method of manufacturing a metal part having an anti-corrosion cover layer on a divided face of a work piece, where the method comprises: dividing one end of a workpiece by the method defined in any one of claims 1 to 5; Y forming the anti-corrosion cover layer at least on the divided face thereof by any method of metallic coating, organic coating, inorganic coating, or chemical conversion coating. 9. A method for joining metal parts, wherein the method comprises: dividing one end of a workpiece, divided by the method defined in any one of claims 1 to 5; insert another metal plate (20) between the divided ends of the workpiece; Y join both metals to each other by any method of pressing, welding, melting, screwing, riveting or gluing. 10. A method for joining metal parts defined in claim 9, wherein the union of the divided metal plate (1) or the metal bar (2) and another metal plate (20) is a joint between dissimilar metals.